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Water system · PWSID CA4300575

TWIN VALLEY INC

CASTROVILLE, CA · ~317 people served

Check your exact address → CASTROVILLE overview
100
Excellent
PurityRadar safety score

PWSID

CA4300575

State

California

City

CASTROVILLE

Population served

317

Primary source

Groundwater

Score history

No change since tracking began Jun 18, 2026.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 100

2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.

PFAS & contaminant readings

No PFAS detections are on record for this system from EPA’s UCMR5 monitoring (2023–25). Absence of a detection isn’t a guarantee — not every system was sampled, and this dataset doesn’t cover other contaminants.

Violations & enforcement

23

Violations on record

0

Unaddressed

5

Health-based

30

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Feb 2019. Official EPA record →

Monitoring · Lead & Copper Rule began Feb 2018 Resolved
Other began Jul 2016 Resolved
Other began Jun 2016 Resolved
Other began Feb 2016 Resolved
Monitoring & reporting · Nitrate began Jan 2016 Resolved
Monitoring & reporting · Total coliform began Mar 2015 Resolved
Monitoring & reporting · EPA contaminant 0700 began Mar 2015 Resolved
Max contaminant level (MCL) · Total coliform health-based began Mar 2015 Resolved
Monitoring & reporting · EPA contaminant 0700 began Oct 2014 Resolved
Monitoring & reporting · Total coliform began Nov 2012 Resolved
Monitoring & reporting · EPA contaminant 3014 began Nov 2012 Resolved
Max contaminant level (MCL) · Total coliform health-based began Nov 2012 Resolved

Recent enforcement actions

  • State action · SOX Feb 2019
  • State action · SOX Apr 2018
  • State action · SFL Mar 2018
  • State action · SFL May 2017
  • State action · SFL Feb 2017
  • State action · SFL Oct 2016
  • State action · SFO Jun 2016
  • State action · SOX Apr 2015

This profile is built from EPA public records for system CA4300575 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.